More specifically, it appears to truncate new generic TLDs to two characters. From the issue tracker: It also affects the newer generic TLDs. Some examples:

More specifically, it appears to truncate new generic TLDs to two characters. From the issue tracker: It also affects the newer generic TLDs. Some examples: .apple becomes .ap .amex becomes .am .army, .arte, .art, and .arab become .ar .audi, .audio., .auto, .and autos become .au .bet and .beer become .be